Function rctl_read_inbuf

freebsd/kern/kern_rctl.c:1539–1562

* Routine used by RCTL syscalls to read in input string. */

 * Routine used by RCTL syscalls to read in input string.
 */
static int
rctl_read_inbuf(char **inputstr, const char *inbufp, size_t inbuflen)
{
	char *str;
	int error;

	ASSERT_RACCT_ENABLED();

	if (inbuflen <= 0)
		return (EINVAL);
	if (inbuflen > RCTL_MAX_INBUFSIZE)
		return (E2BIG);

	str = malloc(inbuflen + 1, M_RCTL, M_WAITOK);
	error = copyinstr(inbufp, str, inbuflen, NULL);
	if (error != 0) {
		free(str, M_RCTL);
		return (error);
	}

	*inputstr = str;

	return (0);
}

/*
 * Routine used by RCTL syscalls to write out output string.